What is the best view to sculpt in? Is it in the persective or orthographic view
There isn't necessarily a "correct" view to do anything in in blender.

However, know that in almost all cases, perspective view will be the view you will be viewing your model in afterwards, and is the physically correct way that people view the world. 

Orthographic mode is really useful, especially if you want to be able to compare distances and look at a model directly from the side, but I don't usually need to do that in sculpting, so I would recommend perspective view.

If you could elaborate a little more on what you mean by "extremely hard to sculpt", I might be able to provide better advice.